Combination hack and scroll saw



May 1927 E..J. BOYD COMBINATION HACK AND SCROLL SAW Filed Feb. 7, 1925 QM Wm iazfl zl 7/lllllillllzl u/////m .AAAAA'W. M y 0 wind 0 Patented May 10, 1927.

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ELLIS J. BOYD, OF OAK PARK, ILLINOIS.

COMBINATION HACK AND SCROLL Application filed February 7,1925. Serial N5. 7,656.

for free rotation when it is desired to use the device as a scrollsaw;

A still further object of the invention the provision of a saw of the character stated wherein the blade carrying clamps may be simultaneously and similarly rota ted during the use of the device as a scroll saw in order to prevent the twisting of the blade.

lVith the above and other objects in view, the invention consists of the construction, combination and arrangement of parts hereinafter fully described and clain'ied, and illustrated in the accompanying drawing, wherein Figure 1 is a view in side elevation of a combination hackand scroll saw constructed in accordance with my invention, the housing for the shaft of the saw being in vertical section,

Figure 2 is a sectional view taken on the plane indicated by the line 2-2 of Figure 1,

Figure 3 is a detail sectional view taken on the planes indicated by the line 3 -8 of Figure 1,

Figure 4 is a detail sectional view taken on the plane indicated by the line l4; of Figure 1, and

Figure 5 is a detail sectional view of one of the drums of the saw.

Corresponding and like parts are referred to in the following description, and desig nated in the accompanying drawing, similar reference characters.

The saw comprises a U-shaped frame. 1 designates the cross bar and 2 and 3 the arms of the frame. Sleeves 4 and 5 are fixed t0 the outer ends of the arms 2 and 3, respectively. A drum 6 is located at and contacts with the outer end of the sleeve 4 and is rotatably supported by this sleeve through the medium of a journal 7 which is preferably formed integrally with the drum and which is threaded at its inner end for the reception of a lock nut 8 contacting with the inner end of the sleeve. The drum 6 and its journal 7 are provided with a bore 9 of polygonal formation in cross section for the reception of the similarly. formed shank 9' of a saw clamp 10. The shank 9 hasa snug fit in the bore 9 to prevent any relative rotary movement between the drum 6 and clamp 10. The shank 9 is provided with a threaded stem 11 upon which a handle 12 is mounted. To prevent the handle 12 from having any rotary movement with respect to the stem 11,

a lock nut 13 is mounted upon the stem for contact with the inner end of the handle. A drum 1% is located at the outer end of the sleeve 5, it. is rotatably supportedby this sleeve, and it is provided at its inner end with a saw clamp 15. The saw clamps 10 and 15 may be of any well known or appropriate construction adapted. to remov ably receive the ends of ablade 16. Brackets 17 are secured to the arms 2 and 3 and extend outwardly beyond the cross bar 1. Blocks 18 to which the end of a tube or housing 19 is secured, are adjustably carried by the brackets 17. tems 20 carried by the blocks 18 pass through openings 21 in the outer ends of the brackets 17 for the reception of nuts 22 by means of which the blocks may be adjusted- A shaft 23 journaled in the housing 19 extends laterally beyond the brackets 17 and fixed upon its extended ends in alinement with the drums 6 and 1 1 are drums 2 1 and 25. A

pair oii cables 26 extend from the drum 6 to the drum 2 1 and are wound on these drums in opposite directions from their center towards their ends, the free ends of the cables being secured to the flanges of drums. A pair of cables 27 extend from the drum ll to the drum 25 and are wound on these drums in opposite directions from their centers toward their ends and have their ends secured to the flanges of the drums.

The connection established between the drums 6 and 14 by means of the cables 26, drum 24, shaft 23, drum 25 and cables 27, is such that when the drum 6 is rotated by means of the handle 12 the drum 14 will be simultaneously and similarly rotated, and due thereto the blade 16 may be rotated without imparting any twisting strain thereto during the use of the device as a scroll saw. When it is desired to use the device as a hack saw, the lock nut 8 is turned up to secure the drum 6 against rm meeseo rotation. This (hum willie tin-11 sectn'e the (il'tttil 1+1; against rotation through the medi 11111 ot the ezbiee 2&3, shaft E211), and cables 37. The ztc ijnstnbiiity of the blioche it; permit; the cables :26 anti If to be maintained under h'tltiil tension as to prevent tiny test motion hetween the (home (3 and 1- The device is simple, thn'nbie aunt etiicient, and it may he rezntiiy converted .i'iioin a heck how into a ricTUii sew or from n scroh saw to n heck sew :Hlti thie may he tione by merely turning the ioeh nut 8 in :L direction to either tree the tilftilit ti or lock it to the sleeve 71:.

White l have titritfii'ibtfti the principle of operation of the invention, together with the device which .1 now consider to be the boot embodiment theretiri, ,t. desire to hnve it motel-stood that the device shown is merely i'thinti'ntive, and that such ohnnges may be made therein when Limited as are within the scope oi. the invention as cieilnel.

What is claimed is:

A saw comprising a frame having a cross bar and parallel :n'lns, tit-inns joul'neled on the outer ends of the anus, sow clamps fixed to the tit-inns, brackets secured to the arms adjacent the croee but and extending outwerdly beyond the cross bar, blocks, means adjnetnbly securing the blocks to the bracketa, :1 tube lcmnted between and secured to the blocks, n shaft joul'nuleti in the tube and rojecting theieirozn outwardly lyieyonet the urine, tittllllS fixed to the ends oi the shaft in aiinenient with the first named til-unis, nintl enbics connecting the first nun'ied. drums to the second named (.hrtnne, said blocks being used to rniee or lower the tube thereby loosening o1 tightening the oables.

in testimony whereof I nlhx my eignw tore.

ELLIS J. BOYD. 

